On the conformational structure of a stiff homopolymer

Details On the conformational structure of a stiff homopolymer On the conformational structure of a stiff homopolymer

1999-06-02

arxiv.org/abs/cond-mat/9906030v1

Physics

Condensed Matter

Soft Condensed Matter

9 pages, 16 PS figures. Journal of Chemical Physics, in press

Scientific paper

10.1063/1.479655

In this paper we complete the study of the phase diagram and conformational states of a stiff homopolymer. It is known that folding of a sufficiently stiff chain results in formation of a torus. We find that the phase diagram obtained from the Gaussian variational treatment actually contains not one, but several distinct toroidal states distinguished by the winding number. Such states are separated by first order transition curves terminating in critical points at low values of the stiffness. These findings are further supported by off-lattice Monte Carlo simulation. Moreover, the simulation shows that the kinetics of folding of a stiff chain passes through various metastable states corresponding to hairpin conformations with abrupt U-turns.

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